Yokohama is Japan's second-largest city and a major port city located south of Tokyo, with a population of over 3.7 million people.

The 3D printing technology, developed by Dainippon Screen in the 1980s, has revolutionized manufacturing and made it possible to create complex objects with ease.

The Showa period, which lasted from 1926 to 1989, was marked by Japan's militarism and involvement in World War II.